In Unsolved Crimes, players take on the role of a young rookie detective in the homicide division who, along with a partner, must solve the mysterious kidnapping of aspiring model Betsy Blake. Set in a stylized 1970s New York, it is up to you to separate the truth from lies and try to find Betsy before it's too late.

The game takes advantage of the unique dual screen of the Nintendo DS, allowing players to immerse themselves in the environments of New York. Players will be able to enter this world, move about, find clues at crime scenes, solve puzzles and answer questions. The innovative use of the Nintendo DS stylus will also allow the player to trace marks, routes and memos on suspicious items discovered at crime scenes, allowing players to advance to solving the kidnapping mystery. In addition to the on-going and developing kidnapping case, players also must solve a series of eight independent cases. There are also five action games related to the kidnapping storyline to undertake.